Graphical Abstract
![](https://wqketang.oss-cn-beijing.aliyuncs.com/zip-unzip/zip-0f17fd23-f7fd-4954-a912-b48c7fc55e06/nr-14-12-4828/files/nr-14-12-4828-FE1.jpg?Expires=1725757733&OSSAccessKeyId=STS.NSssK71aLjDMY9SbRgGRGskMT&Signature=rm6OOgYnfIr5JIa4Ckiq1Mcsoyw%3D&security-token=CAISywJ1q6Ft5B2yfSjIr5DGOPGD3L5t3YamWx%2FihlIyS91rnK7mtjz2IHtKenhsBOsbtfk1mG5W5%2FgZlqJ9SptIAEfJa9d99Myjb%2F9FltCT1fau5Jko1beHewHKeTOZsebWZ%2BLmNqC%2FHt6md1HDkAJq3LL%2Bbk%2FMdle5MJqP%2B%2FUFB5ZtKWveVzddA8pMLQZPsdITMWCrVcygKRn3mGHdfiEK00he8TouufTinpHMskGA1Aell7Mvyt6vcsT%2BXa5FJ4xiVtq55utye5fa3TRYgxowr%2Fwo0v0YpGya5YzHXwcPskvdKZbo78UqLQlla6w%2BGqFJqvPxr%2Fp8t%2Fx5fWJKAezhVgs8cVM8JOjIqKOscIsixo262SmqFV55c8Fdm%2BgUooJVgIMhTnduUfAPJAGOxzJitP%2BUVGGphr60TEnBL4rB5MUctfzRpwT64j3UTzDnGoABhFRSspTLrn9GrEN9pQYzC6eepGdfWDQh3fr5hA1VnwVUJMCz%2BNQEDWKceF%2FnEjWVMtfbvqYxuyhSCmIMMyh5bEREEKEiD%2BFVv4ZfsqnV7hQy5w6HhIkN8kZzP6L0zPvPgkBLOtdMDeDxhf8dVPrCSG4etXHjxcwUaRVb3ZR7Yu8gAA%3D%3D)
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Photothermal CO2 reduction is an efficient and sustainable catalytic path for CO2 treatment. Here, we successfully fabricated a novel series of Ni-based catalysts (Ni-x) via H2 reduction of NiAl-layered double hydroxide nanosheets at temperatures (x) ranging from 300 to 600 ℃. With the increase of the reduction temperature, the methane generation rate of the Ni-x catalyst for photothermal CO2 hydrogenation gradually increased under ultraviolet-visible-infrared (UV–vis–IR) irradiation in a flow-type system. The Ni-600 catalyst showed a CO2 conversion of 78.4%, offering a CH4 production rate of 278.8 mmol·g–1·h–1, with near 100% selectivity and 100 h long-term stability. Detailed characterization analyses showed metallic Ni nanoparticles supported on amorphous alumina are the catalytically active phase for CO2 methanation. This study provides a possibility for large-scale conversion and utilization of CO2 from a sustainable perspective.
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